(19)
(11) EP 4 068 905 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.11.2022 Bulletin 2022/44

(43) Date of publication A2:
05.10.2022 Bulletin 2022/40

(21) Application number: 22165168.0

(22) Date of filing: 29.03.2022
(51) International Patent Classification (IPC): 
H05B 3/14(2006.01)
 H05B 3/74(2006.01)
(52) Cooperative Patent Classification (CPC):
H05B 3/145; H05B 2214/04; H05B 3/74
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 01.04.2021 US 202117220381

(71) Applicant: WHIRLPOOL CORPORATION
Benton Harbor Michigan 49022 (US)

(72) Inventors:
  • Khizar, Muhammad
    21024 Cassinetta di Biandronno (VA) (IT)
  • Buzzi, Ermanno
    21024 Cassinetta di Biandronno (VA) (IT)

(74) Representative: Spina, Alessandro 
Whirlpool Management EMEA S.R.L. Via Carlo Pisacane, 1
20016 Pero (MI)
20016 Pero (MI) (IT)

   


(54) SEGMENTED THERMORESISTIVE HEATING SYSTEM


(57) An electric cooking appliance (100) includes a glass-ceramic substrate (110) having a top surface (112) for supporting cookware for heating thereon, and a bottom surface (114) opposite the top surface (112). The electric cooking appliance (100) includes a plurality of thermoresistive heating elements (200) disposed and spaced apart on the bottom surface (114) of the glass-ceramic substrate (110), with each of the plurality of thermoresistive heating elements (200) including graphene nanoparticles embedded in a ceramic matrix for generating heat upon application of electric current to the respective thermoresistive heating element (200). Each thermoresistive heating element (200) is electrically connected to a power supply such that one or more of the plurality of thermoresistive heating elements (200) are selectively activated to receive electric current to heat localized areas (130) of the glass-ceramic substrate (110).







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Search report